Project:DEIMOS
Stage:Guider TV Focus
ID #: KDTV-001A
Engineer: D. Cowley (T. Freeman)

Mechanical Description of Stage:

Electronic Description of Stage:

Standard constrained rotary stage. Movement is constrained to the motion of the focus mechanism. The stage uses an EL-1236 Stage Interconnect Box, SPDTprimary limits, DPDT secondary limits, and an optical fiducial. The first limit the stage encounters is the software limit. Just beyond the software limit is the primary hardware limit. If the stage makes it past these limits, the secondary limit will break the connection to the motor itself. The software will inform the user that the secondary limit has been encountered. If this happens, the only way to back out of these limits is to manually move the motor shaft. The optical fiducial is used to define the home point. Note that the optical interrupter is only enabled when the stage is moving. This means that the IR emmitter is turned offwhen the focus stage is not moving, e.g., during exposures.

Required setting accuracy :

1. Speed, temperature, accuracies, electrical power, pressurized air,lubricant, coolant, N2 purge, ...
2. Primary (inner) and secondary (outer) limits. These can be magnetic,optical, or physical contact

1. Uphill defined as motor (or driven end of shaft) in lowest position

** reverse limit switches kick back after being enabled

• Gear reduction function:

• Backlash:
• Forward: 53 counts
• Reverse: 40 counts

• Repeatability:
• Forward: Primary Limit - 9 counts
• Reverse:  Primary Limit - 39 counts
• Fiducial:
• Type:Optical Sensor / Blade
• Location: 0
• Encoder:
• On motor:
• On stage:
• Air Cylinders:
• Air Solenoids:
• Air pressure:

NOTES:

Mechanical Drawing(s) # D8140, #D0920

Electronic Drawing(s) # EL-3051

Sign conventions are such that a positive motion of the motor turns the motor in a CW direction as viewed from the drive shaft looking back into the motor, and will drive the stage towards the forward limit.